Module: Minitest::AssertionTests

Defined in:
lib/minitest/assertion_tests.rb

Overview

Use Minitest::AssertionTests to test assertions for Minitest.

describe Minitest::BonusAssertions do
  include Minitest::AssertionTests

  it 'be triggered for false or nil' do
    assert_expected_assertions 2 do
      assert_assertion_triggered '<true> expected but was false.' do
        tc.assert_true false
      end

      assert_assertion_triggered '<true> expected but was nil.' do
        tc.assert_true nil
      end
    end
  end
end

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#spec ⇒ Object (readonly)

The test spec to use for the expectation under test.



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# File 'lib/minitest/assertion_tests.rb', line 23

def spec
  @spec
end

#tc ⇒ Object (readonly)

The test case to use for the assertion under test.



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# File 'lib/minitest/assertion_tests.rb', line 21

def tc
  @tc
end

Instance Method Details

#assert_assertion_triggered(expected, klass = Minitest::Assertion) ⇒ Object

Specify that the assertion was expected to fail with the resulting message.



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# File 'lib/minitest/assertion_tests.rb', line 45

def assert_assertion_triggered expected, klass = Minitest::Assertion
  e = assert_raises(klass) do
    yield
  end

  msg = e.message.sub(/(---Backtrace---).*/m, '\1')
  msg.gsub!(/\(oid=[-0-9]+\)/, '(oid=N)')
  msg.gsub!(/(\d\.\d{6})\d+/, '\1xxx') # normalize: ruby version, impl, platform

  assert_equal expected, msg
end

#assert_expected_assertions(expected = 1) ⇒ Object

Specify the number of assertions that should be called during the test under this block. Most tests should be wrapped in this assertion.



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# File 'lib/minitest/assertion_tests.rb', line 36

def assert_expected_assertions expected = 1
  yield
ensure
  actual = tc.assertions + spec.assertions
  assert_equal expected, actual, "expected #{expected} assertions to be " +
    "fired during the test, not #{actual}"
end

#setup ⇒ Object

:nodoc:



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# File 'lib/minitest/assertion_tests.rb', line 25

def setup # :nodoc:
  super

  Minitest::Test.reset

  @tc = Minitest::Test.new 'fake test case'
  @spec = Minitest::Spec.new 'fake test spec'
end